Genie Gestational Age

This profile sets minimum expectations for an Observation resource to record, search, and fetch observations of gestational age by scan, or gestational age by last menstrual period (LMP) with standard coding and units. It is based on the core FHIR [Observation](http://hl7.org/fhir/R4/observation.html) resource and identifies the *additional* mandatory core elements, extensions, vocabularies and value sets that **SHALL** be present in the Observation resource when conforming to this profile. It provides the floor for standards development for specific uses cases in an Australian context.